Timing device for magnetos.



O. H. H. HEINS.

TIMING DEVICE FOR MAGNETOS.

APPLICATION TILED FEB. 18, 1908. 1,()56,()98 Patented Mar. 18, 1913.

2 8HEETS-SHEET 2.

luucnioz UNITED STATES PATENT OFFICE.

OTTO HEINRICH HUGO HEINS, OF EDGEW ATER, NEW JERSEY.

TIMING DEVICE FOR MAGNETOS.

To all when it may concern:

Be it known that I, O'rro H. H. Hams, citizen of the German Empire, residing at Valley Place, Edgewater, New Jersey, have invented certain new and useful Improvements in Timing Devices for Magnetos; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertai'ns to make and use the same.

My invention relates to an improvement in timing devices for magnetos.

The object of my invention is to provide means whereby the driving shaft and the armature of a generator may be adjusted relatively to each other in order to advance or retard the time of ignition and which will effect such adjustment whether the parts he in operation or at rest.

lVith this general object in view, my invention consists in the features, details of construction, and combination of parts which -will first be described in connection with the accompanying drawings and then particularly pointed out in the claims.

In the drawings Figure 1 is a plan View of a magneto generator and its driving shaft embodying my invention; Fig. 2 a side elevation partly in section of the same; and Fig. 3 an end view with the driving shaft removed.

-Referring to the drawings, A is an electric generator, in this case a magneto-electric generator, whose armature shaft-has a projecting end as indicated at a. To this end a is secured an outer sleeve B in-any suitable way but most advantageously as follows: The end a is tapered as shown m Fig. 2 and beyond the tapered portlon 1s provided with a screw-threaded portion.

I The outer sleeve B has an inward project- 'ing boss I) which is internally tapered to fit tightly onto the tapered portion a of the armature shaft, and is clamped tightly in place by a nut 7) screwed onto the threaded portion of the armature shaft, a washer I) being inserted between the nut 19' and the boss 5. \Vithin the outer sleeve is located an inner sleeve C which is arranged to have an angular or limited rotary movement. relative to the outer sleeve B, but is held against axial movement by any suitable means. as, for example, by providing the inner sleeve with a peripheral groove,

Specification of Letters ram.

Application filed February 18, 1908. Serial No. 418,589.

Patented Mar. 18, 1913.

indicated at 0 into which projects the end of a screw b carried by the outer sleeve B.

The outer and inner sleeves, B and C, are provided with slots inclined to the axes of the sleeves, the slot .in the inner sleeve sloping in a direction opposite to that of the slot in the outer sleeve. In Fig. l the slot in the outer sleeve is indicated in full lines 'at I), while the slot in the inner sleeve isindicated at c by dotted lines. It is advantageous to have a plurality of sets of these slots, for example, two, diametrically op osite each other, as is clear from Fig. 2. I nd in practicethat for the purposes of adjusting an igniter generator the inclination of the slots relative to the longitudinal axis of the sleeves should be about 18 degrees 45 minutes, or in other words, about one fourth the maximum angular adjustment which it may be desired to give to the armature shaft.

The outer sleeve is surrounded by a collar D arranged for movement axially of the coupling, this collar having as many studs as there are sets of slots in the sleeves. In the present instance I have shown two of such studs, as indicated at d, d each threaded into the collar and having an end which projects through the corresponding slot in the outer sleeve and engages the corresponding slot in the inner sleeve. The collar D is arranged to be shifted axially of the sleeves by suitable .means, as for example,

by providing the collar with a circumfer-.

ential groove in which is mounted a ring E having trunnions e journaled in a fork F secured on a shaft G, journaled in bearings g, to which shaft is fixed an arm H arranged to be adjusted as desired in any suitable way.

The inner sleeve is connected to the means for driving the generator in the present case being shown as integral with the end of the driving shaft.

The operation of the device'is as follows: Assuming that the studs d, d are at the centers of the slots, it will be seen that by moving the collar toward the generator, the outer sleeve and the armature connected thereto would be rotated in one direction, the amount of such rotation depending upon the extent of the movement of the collar. If the collar is moved to the full extent of outer sleeve and armature will be rotated 37 30' in said direction. Ifthe collar be moved from the central position away from the generator,the outer sleeve and armature will be rotated in an opposite direction, the limit of this movement being 87 '30 from the intermediate position. Hence by the described arrangement the armature may be adjusted relative to the driving shaft a total of 7 5 degrees, although the slots are each inclined only 18 tothe axis ofthe coupling. The shifting of the collar is done conveniently bymoving the lever H in the desireddirection. It is to be noted that the device may be operated to adjust the armature either when the shaft is still or when it is in rotation.

This invention is designed particularly for advancing or retarding the time of ignition in ignitlon systems for explosive engines, and rmits such an accuracy and nicety of ad ustment that the starting of the engine and the continued operation of the same is made easy and certain.

Havin thus fully described my invention, whatIcaim asnew is:' I 1 1. In a timing device for magnetos, the combination with the exteriorly coned end of an armature shaft, a sleeve having an interiorly coned end'to fit over the coned end of the said shaft, a boss formed onthe sleeve end and overlapping the shaft end, a nut threaded on the shaft end and bearing on the boss, 3. driving shaft, a sleeve formed on the end of the driving shaft-and arranged to have a sliding fit within the first sleeve with its end within the annular s ace be- 7 tween the overlapping boss and .t e inner and overlapping the shaft end, a nut thread-' ed'on'the shaft end and bearing on the boss, a driving shaft, a sleeve formed on the end of "the driving shaft and arranged to have a slidin fit within the first sleeve with its end wit in the annular space between the overlapping boss and the inner face of the first sleeve, an annular groove formed on the outer face of the second sleeve, 9. pin carried by the first sleeve and engaging in the groove to prevent relative longitudinal movement of the two sleeves, the two sleeves provided on opposite sides with a pair of intersecting slots oppositely inclined tothe sleeve axis, a collar mounted on the outer sleeve and carrying studs engaging the slots in both sleeves, and means to shift the collar longitudinally of the sleeves.

In testimony whereof I hereunto affix my I signature in the presence of two witnesses.

OTTO HEINRICH HUGO HEINS' Witnesses GUNTHER JAHTRY, E. A. HUNT. L 

